McDonald, 21, is the first player in 15 years to win both the singles and doubles NCAA Championship while attending UCLA. He is a three-time All-American, 2016 ITA National Men's College Player of the Year, and in 2013 at age 18, became the first unranked player in ATP history to qualify for an ATP Masters 1000 tournament.

He replaces Thanasi Kokkinakis, who previously received a qualifying wild card, but had to withdraw to recover from a shoulder injury.

In the women’s field, 21-year-old Samantha Crawford will receive a WTA singles main draw wild card. The Atlanta, Georgia, native reached the second round at the 2016 Wimbledon Championships, her first Grand Slam win. Varvara Flinkjoins the women’s qualifying rounds with a wild card.